Commonwealth legislation

AD/DHC-1/6 - Engine Mount Pick-Up Bolt - Inspection

RepealedCTH

This Act has been repealed and is no longer in force. It is retained for historical reference.

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

1/10 complexity

What this is: A mandatory safety rule (called an Airworthiness Directive) for owners and operators of a specific vintage military trainer aircraft—the De Havilland DHC-1 Chipmunk.

What it requires: If you operate a Canadian-built model of this aircraft, you must inspect the engine mount pick-up bolt (a critical fastener that secures the engine to the airframe) at least once every 50 hours of flight time.

Why it matters: This bolt takes enormous stress during flight. If it cracks or fails, the engine could literally fall off the aircraft. The directive forces operators to check this specific part regularly using technical guidelines from the original manufacturer (de Havilland Canada).

Who is affected: Only owners/operators of Canadian-model DHC-1 Chipmunk aeroplanes. For the general public, this illustrates how aviation safety law works: specific mechanical components on specific aircraft types are subject to ongoing mandatory health checks.

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Current sections

Direct links to the current provisions in AD/DHC-1/6 - Engine Mount Pick-Up Bolt - Inspection.

AD/DHC-1/6 - Engine Mount Pick-Up Bolt - Inspection

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COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

View image in the official source De Havilland DHC-1 (Chipmunk) Series Aeroplanes

AD/DHC-1/6 Engine Mount Pick-Up Bolt - Inspection 4/54

Applicability: All Canadian models.

Document: 1. DH (Canada) TNS, Series “C”, No. 39, Issue 2; or ANO 105.1.14.15.6.1 Compliance: At intervals not exceeding 50 hours time in service.

Source text

Sourced from the Federal Register of Legislation (legislation.gov.au), CC BY 4.0.